CXC IT Paper 1 and Alternative Paper Jan 2010

FORM TP22230

Test Code 003072

Mock Exam (March) 2010CARIBBEAN EXAMINATIONS COUNCIL

INFORMATION TECHNOLOGY

General ProficiencyPAPER 022 Hours

DO NOT TURN THIS PAGE UNTIL YOU ARE TOLD TO DO SOSECTION 1:HARDWARE AND SOFTWAREAnswer ALL questions

1. Computers are made up of different components and the names of the components are often written as acronyms.

Write the meaning of EACH of the following computer acronyms and state ONE task that is performed by EACH of the components.

a) CU

b)ALU

c)RAM

d)ROM

(8 marks)Total 8 marks

2. State the type of optical disk that is suitable in EACH of the following situations:

a) Best for storing videosb) Can be reused as necessary

c) Commonly used for distributing software

(3 marks)Total 3 marks3. Figures A to C represents three different data capture methods.

In your answer book, copy and complete Table 1 using the list of type of data capture method below.

OMR, OCR, MICR, Voice Recognition

TABLE 1

FigureType of Data Capture Method

A

B

C

Total 3 marks4. a)You wish to purchase one of the devices shown in Figure 1 to 4.

Table 2 lists three requirements an organization may need. In your answer booklet, copy and complete Table 2 to show which device would BEST meet EACH of the requirements in the table.

TABLE 1

Organizational RequirementsFigure

Useful for multi-form sheets

Produces multiple copies rather quickly

Ideal for coloured flyers

(3 marks)b) Write the general name given to the devices in part (a).

(1 mark)Total 4 marks

5. Compute the following:

a) The eight-bit binary representation of the decimal number 17.

b) The sign and magnitude representation for the decimal number 17.c) The results of 55 25, using eight bit, twos complement representation and express your answer as an eight-bit binary number.

d) What is the decimal equivalent for the binary coded decimal number 0011 0101 1000?

(4 marks)6. Answer the following questions that relate to user interfaces:

a) Write TWO ways in which a user can input a command using a graphical user interface.

(2 marks)b) Name TWO types of menu interface.

(2 marks)c) Explain why a graphical user interface is considered to be very user-friendly.(2 marks)d) Explain how a user can input a command using the DOS operating system.

(2 marks)Total 8 marks

SECTION 2:APPLICATIONS AND IMPLICATIONSAnswer ALL questions

7. THREE friends have purchased computers to help them in the music industry.a) State TWO uses of computers in the music industry.

(2 marks)b) Name TWO devices that can connect to the computer and state what they are

used for.

(4 marks)Total 6 marks8. a)State the differences between .edu, .org and .gov as seen in website addresses. (3 marks)b)Write the name of a well-known search engine.

(1 mark)c)You wish to access http:\\caribbeannews.com.

i.State where you would type http:\\caribbeannews.com to access this web site.

(1 mark)

ii.State what http and www represent in (c) above.

(2 marks)Total 7 marks9. For EACH of the following, state whether I is (A) a private area network, (B) a public network or (C) a private network with selected access from public network users.

a. Intranet

b)Extranet

c)Internet(3 marks)Total 3 marks10. a)Describe TWO ways in which a computer can be used illegally.

(4 marks)b)Outline ONE example of how an organization can misuse its customers personal data.

(2 marks)Total 6 marks11. a)Give ONE advantage and ONE disadvantage of using credit or debit cards to purchase items.

(2 marks)b)Explain TWO potential health problems that can develop from using a computer over prolonged periods.

(4 marks)c)Give ONE positive impact and ONE negative impact that is the result of increased use of cell phones in the workplace.

(2 marks)Total 8 marksSECTION 3:PROGRAMMINGAnswer ALL questions

12. a)Explain the difference between a syntax error and a logic error.

(2 marks) b) Explain the difference in the execution of the TWO lines of code written below:

i.Line 1:If MARK >50 Then Print Good

ii.Line 2: If Mark >=50 Then print Day

(2 marks) c)The number 50 was the value for MARK.

i.State the line number corresponding to the above code that would print a result.

(1 mark)

ii.Write the result that would be printed.

(1 mark)Total 6 marks13.Answer the questions below using the following part of a program:

1value1, value2: integer;

2Minimum: real;

3

4value1 = 30;

5value2 = 25.9;

6

7IF (value1> value2)

8THEN read (MinA, value2)

9ELSE writeln (MinB is, value2);

10

a)Write the line numbers that contain code to identify:

i.input

(1 mark)

ii.declaration

(2 marks)

iii.output

(1 mark)b)The program contains FOUR errors. For EACH error write the line number and the corrected line of code.

(4 marks)

c)Identify the follow:

i)A variable

(1 mark)

ii)A conditional

(1 mark)

iii)A data type

(1 mark)

d)Explain the purpose of the program segment.

(3 marks)

e)State the result when EACH of the following pairs of numbers is used in the

corrected program:

i)value1 = 40, value2 = 50

ii)value1 = 50, value2 = 40

iii)value1 = 50, value2 = 50

(6 marks)Total 20 marks

14.If Box1 contains the number 16 and Box2 contains the number 44, state whether EACH of the following statements is TRUE or FALSE.

a)(Box1 = 16)

b)(Box1 < Box2)

c)(Box1 > 16) AND (Box1 < Box2)

d)NOT (Box2 = 44)

(4 marks)Total 4 marks

SECTION 4:PRODUCTIVITY TOOLS

March 19, 2010

INSTRUCTIONS TO CANDIDATES

This paper consists of FOUR sections.

Answer ALL question from Section 1, and 2 should be attempted by all students. Students not doing CXC may leave at the end of this. Students doing CXC should attempt Sections 3 and 4. Use sentences and diagrams where appropriate. All answers should be made in

Standard English and with clear notations being used.

PAGE 2GRADE 11 MOCK EXAM 2010 IT Paper 2